CAS 866-83-1 appears in our catalog under these names: Potassium Citrate Monobasic, Potassium dihydrogen citrate hydrate, 99% (dry basis) , POTASSIUM DIHYDROGEN CITRATE, mono-Potassium citrate, min. 99 %, pure, anhydrous, 250 g, plastic, mono-Potassium citrate, min. 99 %, pure, anhydrous, 500 g, plastic. Offered by: TRC, Thermo Scientific (Alfa Aesar), Sigma-Aldrich, Roth. Available pack sizes: 250g, 500g, 50g, 2kg, 1KG, 2,5kg.